Note 129 — LEGENDS. (continued 2)

To the south and west of the San Mateo Mountains there is a great plain of lava rock of geologically recent origin, which fills the valley and presents plainly the appearance of having once been flowing. The rock is dark and has much resemblance to coagulated blood. This is the material which, the Navahoes think, was once the blood of Yéitso. In some places it looks as if the blood were suddenly arrested, forming high cliffs; here the war god is supposed to have stopped the flow with his knife. Plate VI. shows this lava in the valley of the Rio San José, from a photograph supplied by the United States Geological Survey.